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LC Passive Wireless Sensor System Based on Two Switches for Detection of Triple Parameters
Muhammad Mustafa1, Mian Rizwan2, Muhammad Kashif2
1Micro/Nano Systems Integration R&D Centre, School of Microelectronics, University of Science and Technology of China, Hefei 230026, China.
Sensors (Basel, Switzerland)
|April 23, 2022
Summary
This study introduces a wireless sensing system using LC circuits to simultaneously detect three parameters. The system achieves independent detection by utilizing distinct resonant frequencies for each sensor.
Area of Science:
- Electrical Engineering
- Sensor Technology
- Wireless Communication
Background:
- Passive wireless sensing systems are crucial for remote monitoring applications.
- Existing systems often face limitations in simultaneously detecting multiple parameters independently.
- LC circuits offer a promising platform for developing compact and efficient wireless sensors.
Purpose of the Study:
- To develop and validate a novel LC-type passive wireless sensing system for simultaneous and independent detection of three parameters.
- To demonstrate the system's capability to differentiate and quantify measurements based on distinct resonant frequencies.
- To assess the sensitivity and resolution of the proposed capacitive sensors.
Main Methods:
- A wireless sensing system was designed utilizing an LC circuit with three parallel capacitors and two mechanical switches.
- The sensor coil was magnetically coupled to a readout coil for wireless interrogation.
- Circuit simulations were performed using Advanced Design System (ADS) software, and mathematical analysis was conducted in MATLAB.
Main Results:
- The proposed LC sensing system successfully demonstrated the capability to detect three different capacitive sensors by identifying three unique resonant frequencies.
- Sensor sensitivity was determined by capacitance calculations derived from measured resonant frequencies.
- Achieved capacitance resolutions of 0.1 pF and 0.2 pF were reported for practical applications.
- Experimental results closely matched simulation outputs, validating the system's performance.
Conclusions:
- The developed LC-type passive wireless sensing system enables simultaneous and independent detection of triple parameters.
- The system's design, leveraging distinct resonant frequencies, offers a robust method for multi-parameter sensing.
- The validated performance indicates suitability for practical applications requiring precise wireless measurements.
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